"==" is usually referred to as Loose Equality and on the other hand "===" is referred to as Strict Equality. Both of them are used for comparison in JavaScript.
"==" (Loose Equality / Double equals) operator transforms the type of the operand to the same type before the comparison. For better understanding, if we want to compare a string("20") with a number(20) JavaScript will convert the string to a number for an accurate comparison. During comparison whichever operands' type has lower precedence will get converted to the higher one. The following is a list of the types ordered by "precedence," with the highest precedence type listed first:
<ol>
<li><code>null</code> and <code>undefined</code>
</li>
<li><code>Boolean</code>
</li>
<li><code>Number</code>
</li>
<li><code>String</code>
</li>
<li><code>Symbol</code>
</li>
<li><code>Object</code>
</li>
</ol>
"==="(Strict Equality / Triple equals) operator as the name suggests is a strict operator in JavaScript. This operator checks for the data type of the operands along with the values, so if we compare a string("20") with a number(20) it will return false.
So the main difference between "==" &amp; "===" in JavaScript is that "==" does the type conversion of the operands before comparison and on the other hand "===" will strictly check for the data types of operands along with the values.

"==" is usually referred to as **Loose Equality** and on the other hand "===" is referred to as **Strict Equality.** Both of them are used for comparison in JavaScript.

"==" (**Loose Equality / Double equals)** operator transforms the type of the operand to the same type before the comparison. For better understanding, if we want to compare a string("20") with a number(20) JavaScript will convert the string to a number for an accurate comparison. During comparison whichever operands' type has lower precedence will get converted to the higher one.  
The following is a list of the types ordered by "precedence," with the highest precedence type listed first:

1. `null` and `undefined`
    
2. `Boolean`
    
3. `Number`
    
4. `String`
    
5. `Symbol`
    
6. `Object`
    

"==="(**Strict Equality / Triple equals**) operator as the name suggests is a strict operator in JavaScript. This operator checks for the data type of the operands along with the values, so if we compare a string("20") with a number(20) it will return false.

So the main difference between **"==" & "==="** in JavaScript is that "==" does the type conversion of the operands before comparison and on the other hand "===" will strictly check for the data types of operands along with the values.

Difference between "==" & "===" in JavaScript